f5d6a7b100
* lib/linux/riscv64-mes-gcc/_exit.c, lib/linux/riscv64-mes-gcc/_write.c, lib/linux/riscv64-mes-gcc/crt1.c, lib/linux/riscv64-mes-gcc/syscall-internal.c, lib/linux/riscv64-mes-gcc/syscall.c: New files to make it possible to compile mes for riscv64-mes-gcc.
63 lines
1.7 KiB
C
63 lines
1.7 KiB
C
/* -*-comment-start: "//";comment-end:""-*-
|
|
* GNU Mes --- Maxwell Equations of Software
|
|
* Copyright © 2016,2017,2018,2019 Jan (janneke) Nieuwenhuizen <janneke@gnu.org>
|
|
* Copyright © 2021 W. J. van der Laan <laanwj@protonmail.com>
|
|
*
|
|
* This file is part of GNU Mes.
|
|
*
|
|
* GNU Mes is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 3 of the License, or (at
|
|
* your option) any later version.
|
|
*
|
|
* GNU Mes is distributed in the hope that it will be useful, but
|
|
* WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with GNU Mes. If not, see <http://www.gnu.org/licenses/>.
|
|
*/
|
|
|
|
#include <linux/riscv64/syscall.h>
|
|
|
|
// *INDENT-OFF*
|
|
static long
|
|
__sys_call_internal (long sys_call)
|
|
{
|
|
register long __a7 asm ("a7") = sys_call;
|
|
register long __a0 asm ("a0");
|
|
asm volatile (
|
|
"ecall\n\t"
|
|
: "=r" (__a0)
|
|
: "r" (__a7)
|
|
);
|
|
return __a0;
|
|
}
|
|
|
|
static long
|
|
__sys_call2_internal (long sys_call, long one, long two)
|
|
{
|
|
register long __a7 asm ("a7") = sys_call;
|
|
register long __a0 asm ("a0") = one;
|
|
register long __a1 asm ("a1") = two;
|
|
asm volatile (
|
|
"ecall\n\t"
|
|
: "+r" (__a0)
|
|
: "r" (__a7), "r" (__a1)
|
|
);
|
|
return __a0;
|
|
}
|
|
// *INDENT-ON*
|
|
|
|
/* Returns < 0 on error (errno-like value from kernel), or 0 on success */
|
|
int
|
|
__raise (int signum)
|
|
{
|
|
long pid = __sys_call_internal (SYS_getpid);
|
|
if (pid < 0)
|
|
return pid;
|
|
else
|
|
return __sys_call2_internal (SYS_kill, pid, signum);
|
|
}
|